| 1 | French | économétrie | econometrics |
| 2 | French | -ie | indicates a feminine noun, often an abstract one |
| 3 | Middle French | -ie | indicates a feminine noun, often an abstract one |
| 4 | Old French | -ie | indicates a feminine noun, often an abstract one |
| 5 | Latin | -ia | Used to form a feminine abstract noun, usually... |
| 6 | Latin | -ius | forming adjectives from nouns; nominative neuter... |
| 7 | Proto-Italic | -jōs | Forms comparative adjectives |
| 8 | Proto-Indo-European | -yós | Creates adjectives from noun or verb stems |